The origin of rare alkali metals in geothermal fluids of southern Tibet, China: A silicon isotope perspective
Name:
s41598-019-44249-5.pdf
Size:
4.132Mb
Format:
PDF
Description:
Final Published Version
Author
Wang, WeiWei, Hai-Zhen
Jiang, Shao-Yong
Tan, Hong-Bing
Eastoe, Christopher J
Williams-Jones, Anthony E
Hohl, Simon V
Wu, He-Pin
Affiliation
Univ Arizona, Dept GeosciIssue Date
2019-05-27
Metadata
Show full item recordPublisher
NATURE PUBLISHING GROUPCitation
Wang, W., Wei, H. Z., Jiang, S. Y., Tan, H. B., Eastoe, C. J., Williams-Jones, A. E., ... & Wu, H. P. (2019). The origin of rare alkali metals in geothermal fluids of southern Tibet, China: A silicon isotope perspective. Scientific reports, 9(1), 7918.Journal
SCIENTIFIC REPORTSRights
© The Author(s) 2019. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
Geothermal waters from the Semi, Dagejia and Kawu hot springs in the Shiquanhe-Yarlung Zangbo geothermal field of southern Tibet (China) are highly enriched in rare alkali metals (RAM). However, the enrichment mechanism is still hotly debated. Here, we report the first silicon isotope data of these geothermal waters to unravel the origin of the extreme RAM enrichments. Sinter precipitation in the spring vents and water-rock interaction in the deep reservoir controlled both the silicon budget and silicon isotope fractionation. The rates of water-rock interaction and sinter precipitation in three spring sites decrease in the sequences Semi > Kawu > Dagejia, and Dagejia > Kawu > Semi respectively. Silicon isotope fractionation during sinter precipitation (i.e. Δ30Siprecipitate-solution < -0.1‰) is less than that due to water-rock interaction (i.e. Δ30Sisolution-rocks at least as high as -0.47‰), which makes it possible to use the δ30Si signatures of springs to evaluate the intensity of water-rock interaction. Based on the available evidence, a conceptual model of RAM enrichment is proposed: (i) persistent magmatic activity in southern Tibet provided the initial enrichment of the RAM in host rocks and a heat sources for the deep reservoirs of geothermal systems; (ii) the high Cl- content and long residence time (thousands of years) promote the leaching of RAM from the silicate host rocks.Note
Open access journalISSN
2045-2322PubMed ID
31133710Version
Final published versionSponsors
National Key R&D Program of China [2017YFC0602405]; National Natural Science Foundation of China [41673001, 41872074, 41422302]ae974a485f413a2113503eed53cd6c53
10.1038/s41598-019-44249-5
Scopus Count
Collections
Except where otherwise noted, this item's license is described as © The Author(s) 2019. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License.
Related articles
- B-Li differential enrichment of geothermal systems in the Da Qaidam and Gonghe-Guide Basin, northeastern Tibetan Plateau: Evidence from water chemistry and H-O-B-Li isotopes.
- Authors: Han C, Fan Q, Xiao Y, Li Q, Yang H, Chen T, Zhao W, Wang S
- Issue date: 2024 Dec 10
- [Hydrogen and oxygen isotopes of lake water and geothermal spring water in arid area of south Tibet].
- Authors: Xiao K, Shen LC, Wang P
- Issue date: 2014 Aug
- Tungsten from typical magmatic hydrothermal systems in China and its environmental transport.
- Authors: Guo Q, Li Y, Luo L
- Issue date: 2019 Mar 20
- Mechanisms of arsenic enrichment in geothermal and petroleum reservoirs fluids in Mexico.
- Authors: Birkle P, Bundschuh J, Sracek O
- Issue date: 2010 Nov
- Hydrogeochemical Characteristics and Conceptual Model of the Geothermal Waters in the Xianshuihe Fault Zone, Southwestern China.
- Authors: Li X, Huang X, Liao X, Zhang Y
- Issue date: 2020 Jan 13